Autoselective regenerating particulate filter
AssigneePerkins Engine Company Limited
InventorsColin Peter Garner, John Ernest Harry
Life of this patent
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Abstract
The present disclosure provides an apparatus and method for removing particulates from a gas stream. The apparatus includes a ceramic filter, at least one electrode, and at least one conductor. The electrode is located at an end of the filter and produces an atmospheric glow discharge in order to oxidize carbon deposits trapped in the filter. The conductor extends at least partially into the filter and acts as a counter electrode. Through various arrangements of the electrodes and conductors, the present disclosure provides closer connection between the trapped carbon deposits and the electrodes. This improves the regeneration of the filter without increasing the size and/or weight of the apparatus.
Claims20
An apparatus for removing particulates from a gas stream, the apparatus comprising:
- a ceramic filter through which gas may be caused to flow, the filter having a first end and a second end and including a plurality of elongate cells extending substantially parallel to the direction of gas flow;
- at least one electrode located at an end of the filter for producing an atmospheric glow discharge;
- and
- at least one conductor spaced away from the at least one electrode and configured to lead current from the electrode out of the filter;
- wherein the conductor extends at least partially into the filter.
An apparatus for removing particulates from a gas stream comprising:
- a ceramic filter through which gas may be caused to flow, the filter having a first end and a second end and including a plurality of elongate cells extending substantially parallel to the direction of gas flow;
- at least one electrode located at an end of the filter for producing an atmospheric glow discharge;
- and
- at least one conductor spaced away from the at least one electrode and configured to lead current from the electrode out of the filter,
- wherein the apparatus is mounted within a filter housing, the housing being provided with apertures for the ingress and egress of gas, and wherein the at least one conductor includes a portion of the housing.
A method of removal of particulates from a gas stream comprising:
- causing the gas to flow through a ceramic filter so that particulates are separated from the gas flow and trapped by the filter, wherein the filter has a first end and a second end and includes a plurality of elongate cells extending substantially parallel to the direction of gas flow;
- positioning at least one electrode at an end of the filter;
- positioning at least one conductor at a location spaced away from the at least one electrode, such that the conductor extends at least partially into the filter;
- generating an atmospheric glow discharge from the electrode;
- and
- leading current from the electrode out of the filter through the conductor.
Dependencies are inferred from the claim text.